I agree 100%!It cuts the 12 volts down to 5 volts and than it dies, I think it was a very bad idea
Thanks, RedFish. That makes perfect sense.In the beginning all vehicles had 6 volt charging systems and gauges.
When the 12 volt system came alone, mfgrs were faced with 2 options. Build 12 volt gauges or limit the power to 6 volts for the same gauges. 90 % opted for the 6 volt gauges and a voltage limiter. GM is one of the few who went to 12 volt gauges.
Those early 12 volt gauges produced almost constant needle movement.
Wht are the values/componets used? Please advise!
Here's what I used. With pictures!!!
There are a few sites out there with the procedure, but this one is the best I found.
If you do the 7805 conversion, you should know that your gas and temp gauges will probably give low readings. That was causing me lots of confusion with my gas gauge. It was like my gas tank had shrunk. When the gauge read empty, I would fill the tank - but it would only take about 11 gallons or so.:dontknow: And I was only getting about 160 miles from a 'full' tank.
If my logic is wrong, please let me know. Sorry about the long post...
I was using the $6 radio shack IVR as outlined in MA for a long time.
Couple of gagues were a bit low, and slower to respond but the tradeoff's were worth it at the time
I've since switched it out to a RTE unit - with much better performance.
I hated to spend the extra $$ BUT once I realized that if there was a loss of ground with the Radio Shack version that it will default to 12V I didn't want the risk of fried guages.
something to consider.......